Riding lawn mower



FIG. 1 is a front view of a riding lawn mower showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a perspective view thereof; and,

FIG. 5 is an enlarged cross-sectional view of a portion thereof takenalong lines 5-5 shown in FIG. 1.

The broken line showings of FIGS. 1-5 are environmental only and notpart of the claimed design.

The dashed-dotted line showings of FIGS. 3 and 4 illustrate a boundarybetween the claimed design and environmental features.

CLAIM The ornamental design for a riding lawn mower, as shown anddescribed.